Control apparatus



NOV- 5 1945. E. E. HEWITT CONTROL APPARATUS Filed Jan. 29, 1943 @Q OQ 5 mmm mtl

,n INVTR Ellis E Hewi BY di;

ATTORNEY such pressure acting on piston 6 will -move same in the direction of the left hand for moving the clutch controlarm'B'from neutral` position toward fforwardpositionror from -astern position to eitherY neutral position or forwardf position, in accordance with the desired positioning of the clutch. When iiuid pressure is v supplied to chamber IU such pressure will act on piston 6 to move the clutcnzcontrol lever:3 in the direction of the right hand from .neutra t of the pilot piston is a chamber 33 which is in constant communication with the atmosphere through a'pa'ssage 34 injtheipistonrod I'I. A passage 35 in the casing is opento chamber l33 midway between the two piston heads I and I5 `when the pilot piston I4 is in its neu-tral position valve `Ydevice comprising a forward valve device Y I2 and a reverse valve device I3 which in turn are arranged to be controlled by the cooperative actionof apilot piston I4 and the power piston 6.

,The`pilot piston I4 comprises two spaced piston heads, I5 and lliconnected to one end of a piston rod I'I which extends to the exterior of the casing. The outer end of thepiston rod Il is operatively connected to a lever I8 ata point located intermediate the ends `of the lever. One erd of the lever I8 is operatively connected to theY power piston'rod 'I through the'medium of a.

linkfl 9'while the opposite end is connected to one end bf a reach rod 2.0 .which has connections (not shown) with the forward and release valve devices I2 and I3.y

The pilot piston I4 has at one side a pressure chamber 22 open to a control pipe 23, and has atthe'opposit'elside a pressure chamber 24 open to a control pipe 25. Two spring stops 21 and 28 are .'.slidably mounted on' the piston rod Il in chamber 24, and encircling said rod `and bearing at opposite endsA on said stops is a' neutralizing spring 26 which is lunder rinitial compression. The stop 28 engages the piston head I5 and has any" outturned collar 29 'arranged to cooperate with a shoulder "in a casing to limit movement of said stop toward the right hand. The stop 2l has an inturned collar 3ll at one end for engaging a shoulder Von piston rod I1 so as to move said stop with the pilot piston upon movement of said piston toward'the righthand. The stop 21 also has an outturned collar 3Il for engaging a shoulde rin a casing to limit movement of said stop toward-the left hand. With the collars 29 and 3l onfthe two stops engaging the shoulders in the casing under thepressure of spring 26, the interengagement of stop 2l wi-th piston rod I'I and of stop 28 -with the pilot piston positions said piston in its neutral position shown` in the' drawing.

The pilot piston I-4 is arranged-to be moved in either one direction or the opposite direction out of neutral position by uid under pressure supplied through either pipe -23V or pipe'25 with the other pipe vented, by means'which will be later described. Fluid under pressure supplied through pipe 23- to chamber 22 will move the pilot piston I4 and stop 28 against springZ until such stop engagesv a stop'ring 32 in the casing which defines a forward position of said piston. Fluid under pressure supplied through pipe 25 tok chamber 124' will move the pilot piston and Astop 2'I against spring'l untilwsuchstop engages theV stop ring 32 which `defines a reverse position of from either pipe 23 or 25 'with the other pipe vented,` spring 26 will return'the pilot piston as shown., When the pilot piston is in its forward vposition passage 35 is opened to chamber 22. In the reverse position of the pilot piston passage 35 is open to Ichamber 24.

The rod ZBeXtends through a jaw 36 projecting vupwardlyfrom the casing. At one side of jaw 36, rod 20 is provided with an adjustable stop 3l and "on the other side with another adjustable stop 38, said stops being provided for engagement with said jaw to limit movement of said rod and thereby of the pilot piston I4 relative to the power piston 6 to a degree just sufficient to actuate valve device I3 or I2 to supply uid under pressure to the power piston chambers I0 or 9, respectively.

'I'he reference numeral 40 indicates a lportion of a fuel supply device for governing the amount of fuel supplied to the engine towhich the clutch controlled by clutch arm 31 is connected. This device may have an-adjusting arm 4I for governing the amount of fuel supplied to the engine, and said arm may have an engine idling position, suchas shown in the drawing, for limiting the fuel supply to the engine to a degree which will provide for idling operation thereof. The arm 4I may be moved from this idling position for increasing the supply fuel to the engine and to a position indicated by a dot and dash line 42 which will provide for the maximum fuel supply to the engine and thereby operation of the engine at maximum Speed or power output.

A power motor 43 is provided for yadjusting the position of arm 4I. The motor comprises a casing containing a movable abutment preferably in the form of a flexible `diaphragm 44 which is connected through a follower provided on the end of rod 45, a lever 45, and a link 41 to the arm 4 I The diaphragm 44 has at one side a fluid pressure chamber 48 while at the opposite side is a coilspring 49 circlingthe rod 45 and acting on the diaphragm in opposition to pressure of fluid in chamber 48. With the chamber 48 open 5 to the atmosphere the spring'49 will maintain th pressure chamber 48 to a degree sufficient to over- V the piston.4 Uponrelease' of fluid under pressure come the opposing force of spring 49, the diaphragm 44 will be deflected upwardly and thereby move the adjusting arm 4I out of its engine idling position in the direction of the full speed position indicated by the numeral 42. The full speed position will be obtained when the pressure of fluid in chamber 48 is increased to a suicient degree to'movethe follower vinto engagement with a stop 5I in the casing which defines said position. It will be readily seen that the arm 4 I may be adjusted to any position between idling position and fullspeed Yposition by providing the proper pressure of fluid in chamber 48 to act on the diaphragm 44.

The pressure chamber 48 in the power motor 43 is connected through a pipe 52 to an interlockvalve device 53. A choke 54 is provided to restrict flow of fluid through pipe 52 in the direction of motor 43. A passage 55 by-Dassing the choke 54 is provided* to allow an unrestricted rate of flow of fluid under pressure from diavalve 556 for. rendering :the 'icho'ke effective-:upon

flow of fluid under pressure'in thelsoppositeltdirection ithrough l'said pipe.

"The 4interlock valve ldevice comprises two coaxially arrangedfpoppet lval-ves 58 and `359 @which aire 1oppositely'.arranged.and have lluted V-stems" engaging eachother '-in a chamber i60 4to -vs'hi'ch the pipe 52 is open. The valve 58 is contained in a chamber 6I which is open to a pipe 62, while the va'lve 59 is conta-ined in af'jchamber '63Which 'is open through aipassage Eil to the atmosphere. A

spring `155 in chamber 5| acts-on Valve 58ffo r seating same and Vat the, sameftime `unseating the valve 59. f l

The .interlock 4valve ,device .further Icomprises ,a piston 6B .having a stem 6.1 for engagingthe valve 59. .One side .of .the ,piston is opento .the-at-A mosphere through chamber 63 `and 'passage while at the opposite `side `of -saidpistons..a chamber 58p which .is .connected by .a pijoeLz-:BB @to passage ,.35 .in the .clutch motor 5. l. `Withfthefpilot piston M of the lclutch motorinits neutralyposiftion-fopeningpassage 53;*5 to theatmosphere, gcham'- ber-68in the -interlock valvedevice will be :like-A wise `f'openeli :to ythe atmosphere :so that, lDoppet valve 58 will Vbe seated .and puppet valve (59 `.unseated :by :spring 65, thereby opening` pipe .11524 and achamber58 int-he fuel supplyrmotor to ithe' atmosphere to provide for operation oficthepower motorcd :to h'old Ithe adjusting farm' 41 loflxthe fuel governing device ,43;in;itsiengine;idlinglposi tion. :Wlh'en the .pilot :pistonMisin.itsextreme left-'hand .position .opening passage. 35 to chamber22or in its extreme righ'thand lpositionopening said-passage to chamber. 24,- fluidunder pressure actingin either of said'chamberswillflow to saidpassage-and-@thence through l'pipeell to' chamber 168 in the interlockvalvedevice. This fluid 'in chamber 68 ywill actuate the ypiston-'E6 to -seat thepoppet valve 59 `and -open thepoppet" Valve- .58 to thereby connect pipe 152 to' V pi-pe L62 toprovide for control of the motor 143 a'ndthereby'adjustment 'of the `Afuel` supplyr armA 4T-in ac- Acordance withjpressure fluid actingin pipe 62.

The supply and release of fluid to j pipes .123 .and-25 leading "to the vice'53 is arranged to be lcon'trolledby a( manually operative control `device indicatedlgenerally bythe reference lnumera'l 15, and which willri'ow` be described.

` The manually operative control .device 1 5 y.com-- prises 4a .casing or body portion ycontaining .two

selector valve devices .'iand rL'I Vr,for controlling thelsupply and release of fluid under pressure :to`

and Afrom athe pipes 423 and 25 respectively, :and

aself-lapping valve device .1B -for controllingthe supply `andrelease .of fluid under pressure to and from -the pipe 62. j t

The ftwo :selector valve devices,` which are' identical in "structure, .are arranged :side iby` :side slightly spaced -.apar,t:relation .and teach :comprises a uid 'pressure supply valve `I9 ycontained ina chamber 80 and arranged toLcontrol communication fbetween said chamber and Va :chamber L8 I .In theselector:valverdevice116 .the .chamber 8l is yconnected to pipe 323, iwhile in the .selector `valve device 'Hisaid'ehamber is connected to :pipe 525.'

Both chambers S8!) are constantly :supplied with uid under pressure 'from any `suitable source through a supply -pipe 812 Iand each icon'tainswa:

under pressure: clutch motor '5,' and .to Vpipe 62 leading to the interlock' 'valve' de- Y forxseatingf'same.

in eachi of thefselector :valve devicesxfone wan?,`

of4 chamberf8zl 4.is :formed by .a :closurefcap which fis :slidably mounted a :sleeve :.R5,\.a1'suitable; packingfibeingfinterpcsedfbetween .said .capandV sleeve .to .preventileakage of .ffluid under y.pressure from chamber iil A `:releaservalve ..81 .contained in `.a chamber B3? at one lend :of the Sleevetiifsi arranged touseat .against isa-id end of said sleeve and has a 4iluted :stem extending through-ai suitableuborerin the sleeveinto fcclnam'berY 81,:rsaid` sleevezan-d :valve being arranged Vin coaxial :relation `with ftherespective supply valvez'lS.

The-cieleasevalve; P8?! ,in. each of: the .selector valve devices :is provided to econtrol communica" tion :between chamber "81 and chamber"V 88 which is 'open tofthe atmosphere `througha port 89. JA perforated follower is slidably .mountedin :the inner `end .of :each `closurenmember `till for engag-` ing .the adjacent .end'ofsleeve `85 and the end of! thezfrelease valve rstem, .anda-spring 9| in cham ber 8l vacts :cnlsaid follower for unseatingthe releaseuvalve` land, .for moving the follower fand sleeve 85 to the positionfinwhich they are shown and #which Ymay `:be den'ed by :engagement'between said sleeve andthe respective `cap 58H. In: this pgosition of sleeve .185, fthe 'release Ailalvehfl iswunseated .as justrmentionedwand the supply! valve 19 :is'seatedfandfthe space 9between rthe stems of fthe two rvalves '.equa'ls :substantially Athe -dis tance the release valve 8:1:M isnunseated Afrom St-he sleeve 585. V.Movement:ofastem 82 projecting from? the rlelease ivalve Sil l'inwardlyrof icap .84 Wil1`-movei `the release valve-'8:1 into engagement-.with lthef end of sleeve 85 and at the same ftimelmove the` follower 9ll against :the spring Si!:intovsubstan-` tial engagementfrvith ithef'stem yoftl'ie supply valve 79. ,Afteri'th lreleaseV valve lfis thus seatedv further zinward movement of stem 82: lwill then move 4the `sleeve '85 with ithe f-re1ease 'valve and act through the follower B0 Sto unseatf-the supply valve "1:9 ALto fthereby supplyl `luid from chamberitochamber 8;|`-. Upon `release `of force on the stem ,92 fspring '91"'will return Ethe sleeve 85land release. kvalve 28,1. .to the .positions in which 1'they are shown in 'thedrawing and? during `such move-` l ment first allow closing of the supply valve lgbyi spring83 and then *theo'pening of thelrlease valve "8J 'for .releasing fluid under pressure from' the chamber 82|. :Thetwo plungers or `stems 92 in the selector valve vdevices v16 :and Vl` are `engaged l by opposite end 1 portions of Aa lever 95 `which is mounted on a ifulcrum pin L disposed intermediate said" stems. Rockingfof the leverf95 in-one direction will therefore actuate Vone selector valve device" to supply 4iluid under pressure toits chamber'l while allowing the-other selectorvalve device 5to maintain itsw chamber-8l `open* to the atmosphere.; On the other hand'rocking oflever `95 ylx1-the op-f posite direction will reverse *the operation of Y-th'e twoselector valve devices.4 It lwill thus `-be-seen that when fluid under -pressure is `suppliedto either one of I"the pipes '23 or 25 'by operation of the respective Aselector valve device L16 or"l 8,-the other of said pipes `will be-open to'atmosphere.j`

Theself-lapping valve device -18`may be pfv any suitable structure embodying v` a control lmember' or plunger operative -upon downward-move? ment from a normal'pos'itionsuch `as shown in' the drawingxto Supply uuid to a pipe, suchlas the pipe j'l5-2, ata pressure ldependentuponjthe" extent fof fsuch movement `and to *open saidpip" toatmosphere in fsaid normal-position,

' A rockV shaft I0 disposed above'theplungcr 60 is journaled in the casing in two spaced bear-v and oppositely arranged cam surfaces |05 joined.

by a recess |06 provided to receive one side of a power transmitting member |01 the oppositev side of which is in contact with the control member or plunger |00. With the cam element positioned for recess |06 toreceive the member |01 the control member in the self-lapping valve device 18 is arranged to voccupy its normal positionto provide for opening of pipe 62 to the atmosphere. Rotation of the rock shaft |0| and thereby of the cam element |04 in either directionfrom this normal position is arranged Yto move theV member |01 and thereby the control member |60 in a downwarddirection for supplying fluid to pipe 62 at a pressure proportional to the extent of such movement.

Opposite the cam recess |06, the cam element |04 has two spaced parallel arms |08 between which extends one end of an operators control lever |09. A bolt ||0 extends through ythe two arms V|08 andthe lever |99, thereby providing for rocking movement'of the lever |09 in the cam element lengthwise of the rock shaft |0I. Movement ofthe lever |09 circumferentially of the rock' shaft will actuate the cam element |04 for controlling the self-lapping valve device 18, as will be apparent.

.The rockY` shaft |0| is provided with an axial bore in which is slidably mounted a plunger I2 having a slot ||3 aligned with a relatively long slot II4 through one side of said shaft. The inner end ofr the operators lever |09 extends through the slot I I4 and into slot I3 and within the shaft is connected to the plunger ||2 by means of a pin 5 secured to said plunger. Rocking of the lever |09 in either direction from a neutral position shown, lengthwise of the rockv shaft |0| will thus move the'plunger ||2 lengthwise. Y

,- The-selector valve operating lever 95 is provided with an extension |16, the end of which is in the formv of a yoke I I1. The two parts of thisyoke are disposed at opposite sides of the plunger At the side adjacent the control.

H2 in an annular groove or recess IIS therein whereby the lever 95 will be rocked upon movement of the plunger I|2 in either direction from a normal or neutral position shown in the draw-l ing. f

A cover |20 is secured to the manuallyoperative control device and is provided with a slot |2|. in which the'operators control lever |09 is` arranged to move for controlling the sequence of operation of the selector valve devices 16 andV 11. and of the self-lapping valve device 1B. This slot has a central portion |22 providing for movement of the operators lever |09 lengthwise of the rock shaftv |0| forlcontrolling the two selector valve devices 16 and 11, while retainingv the rock shaft 0| in a neutral .position yproviding for operation of the self-lapping valve device`18- to maintain pipe (i2-open to the atmosphere. At the end of the portion .|22 of slot |2|the lever |09- maybe moved at right angles into a portion |23 of saidslot Afor-thereby. rocking the rock shaft |6| out of the neutral position for actuating the selflapping valve device 18 to supplyfluid to pipe 62 Operation Let it be assumed that the operators control lever |09 is in its neutral position as shown, thereby causing opening of the pipes 62, 23, and

25 to the atmosphere. Under this condition the -pilot piston I4 will occupy its neutral position shown and the valve devices I2 ,and I3 will be conditioned so that the power piston 6 will also occupy its neutral position as shown, and as a consequence the clutch control arm 3 will be in its neutral and disengaged position, for reasons which will be set forth later.

In the neutral position of pilot piston |4 piston chamber 68 in the interlock valve device 53 will be open to the atmosphere through chamber 33-between ton,'and as a result spring 65 will act to close the supply valve 58 and open the release Valve 59 so as to thereby open diaphragm chamber 48 in the fuel supply control motor 43 to the atmosphere to provide for operation of the engine at idling speed.

Now let it be assumed that the operator desiresto move the craft in a forward direction. To accomplish this, he moves the lever |09 from its neutral position to the right hand end of the portion |22 of slot I2I, as viewed in Fig. 2, and this movement causes the plunger ||2 to shift endwise to actuate the lever in a counter-clockwise direction as viewed in Fig. l. The lever 95 as it is thus operated, actuates the selector valve device 16 to supply uid under pressure to pipe 23, while the selector valve device 11 demains in the condition shown opening pipe 25 and thereby chamber 24 at one side of the pilot piston to atmosphere. Fluid under pressure thus supplied to pipe 23 flows to chamber 22 at the opposite side of the pilot piston I4 and moves same in the direction of the left hand. The power piston 6 has a greater reluctance to movement than the pilotpiston and consequentlythis movement of the pilot piston is relative to the power piston and turns the lever I8 in a counterclockwise direction about its fulcrum connection with the power piston rod 1 and thereby moves the reach rod 20 to a position in which stop 38 engages jaw 36 which prevents further movement of the pilot piston at this time. VThis operationof the reach rod 26 operates the valve device l2 to supply fluid under pressure to chamber 9 at one side of the power piston 6,'whil the valve devicev |3- remains in the condition opening the power piston chamber I0 to the atmosphere. As a result, the pressure of .fluid in chamber S'acting on the power piston will then move same in the direction of the left hand and thereby rock the lever or clutch arm 3 4 and jaw 36 under the pressure of fluid on the pilot piston I4, but said pilot piston moves with the A power piston 6. The two pistons will thus con-4 the two piston heads of the pilot pisposition as just described-it is desiredfto frelease the fluid under. pressure: f-rorn` chamber 9? for relieving theclutch arm 3/ and thereby; the; thrust bearings in the clutch of the shitting force;v To accomplish this, an unloading. valve device:` |2411 is associated with the clutchmotor 5^: to control the supply of iluidfrom any'suita-ble-sourceysuch asa pipe |255` to the valve devices |2f and-:|32 for supply to VtheY opposite, sides 'o-the power'pistoxr 6 for actuating same, and this devicefis controlled by the pilot piston.` Ik throughipassageiSS; With passage 35 vented atmosphere by way of chamber 33vbetweenthe pilot pistonheads l5 and |65 the unloading valve device |21la operates to open,l the fluid press-uresupply communication between pipe |125- and valvedevices- 2V and. I3; but

upon movement of the pilot pistonto theeX-treme left hand or forwardy position passage 35 is connected to chamber 22.. Fluid` under pressure then flows from chamber 242- tofpassage; 35 and from a thence tothe unloadingrvalve'device- |'24a which dev-ice respondsto the supply ofiuid-lunderpressure'tocut oi the supply of fluid under` pressure throughsthe valve device |-2- to theV power piston `clflarnber 9, and-toppen sai'dchamberto the atmosphere therebyy relievingthefclutch; arm 3i and clutch bearings or actuating. pressure.`

Withthe-pilot pistone |f4 out` oi its extremeileft hand or forward position opening passageI 35 to the atmosphere; itV willbe noted that. chamber: 68 in the interlock valve devicefi is vented:s.o: that the interlock valve device 53:.'willfremairrri` the condition'in which it is shownrwhich insures operation of the-engine:v onlyatl idling: speedj. However, after the pilot piston attains its forward position, inwhich. the

clutchis substantially in; its

forward position, fluid under pressure supplied to passage 35 will also flow to-chamber'683in the interlock valve'device, this supply `occurring at the same time a-sto the unloading` Valve device |24a. The fluid under pressurerthus'. supplied; to chamber 68 in interlockyvalve device then moves the piston Gsthereininthe. directionof the left hand .which seats thevalvef 519i and opens. the valve 58. thereby` connecting pipe 5221 13o-pipe 62 leading to operators` controlv vali/Te` device. T5.

If the operator now desires.` iso-accelerate the engine to a'speed above idling he movesithe` lever |09 outof` the `portionV |22'.of slot.- |21 intoxthe portion |2Itfor thereby.actuatingathe` self-lapping valve device 'i8 to increase the-pressure" oiuid in pipe:` 62 and thereby in; charnberpl" of'. the.r power control motor 53 to a. degree'depending upon the extentV of movement of said?. lever asedetermined by the desired speed or: output or the engine. The

pressure of fluid thus supplied' toxdiaphragmf i ehrmirberV 48` then; deflects diaphragnfr` Mr against the` opposing power of` sp'rin-gf)` and actuates` the fuel supply arm, 4|: out of its idling-position to the desired fuel supply position..

It will be noted that, as so. far described; the:

lever |09 may be moved to the right hand endnf the portion |22 ofslo-t |21 and .theninunediately intoV the speed. control portion |23: `of saidtslot without. waiting `for operation of the. clutchamotorx5 to move the clutch.4 controlarm; to,- itsriorl" ward' position, :butfthef` engine will@ notY bei accelerated in response tosl such movement due tofthe interlockfvalve device* 53 which.V insures thataithe l engine speedwill not;berincreased until afiter' operation of the clutch motor 5 to move-the clutch control armi-to its forwardfposition V If" the operator `now desires Ito "move the clutch arm` 3i `from-forward position baclr tofneutral Aposition-l `hef-returns the contr-oli lever |091to -its neutraliposition inwhich itis shown in` Figs. 1 fand,2` "If'l'iis` movement ofn lever`|09 rst` effects operation of `ithe sel-fllapping valve device 'E8-'Htc open. pipe SZ: andi thereby diaphragmchamber A48 in the power `motor *43 lto the` atmosphere topravidefor operationfoffsa-id motor tofreducethe speed of the'engine to-idling. Thelever `lillas it is thus operated'l 'actuantesl the plunger-1|i|2fto return the selector valve control lever -9`5f"\to"v its normali position in which it` is shown for thereby effecting operation!` of the selector valvev device T6'fto open pipe `28 and=` thus ehamber^22 at-` one side of"thepilotfpiston=toatinospherei i f' Upon this ventingof fluidL underpressure lfrom chamber `222;` spring 261 returns thewpilot piston |14* towardits neutral position# and this movement of the pilot: piston 'actuates-lever IW andithereby reachrodA 1to apositicnin-w-hich stop 31' :contacts the jaw V3614 This-movement of-"theereach rod- 20 permits' such movement of the pilot piston as toopen passage 315- tothe atmosphereto thereby provide for "operation of the unloadingfvalve devicel |24a to: open communication betweenthe .l fluid pressure `supply pipe |25- and the valve`-de vice |3 and suchf movement oftliefreachA rod-f20 alsoaoperates-thelvalve device |3fto opent* the Quid pressure supply communication to chamber-TID. Fluid under ApressureA thenA flows fromA pipe `|2'.i tolchamber |40 andacts onfth'e power-1f` iston`l 6 toJ move same the direction ,ofiv the righthand toward its neutralpositionf When the power `piston 'thus starts` moving, thepilot piston- |:4 initially moves 'li-herewith untilthe fool-larn y29L on stopiring 28:- engages the casingat which time the f pilot pistonmovement will-icease.` However, the power piston will'continue tov-move toward the right hand relative to the `pilot piston, and-'such movement willi rockthe lever- `|8` aboutgtheffulcrum connection with the x pull-f the reachrod Z'Ul back` toward its normapositionfshown. The reach rodI'Zvas i-ttlfius'moves will actuate the valvedevice |3`to open the-power piston chamber lvfto atmosphere at substantially `the time said piston obtains its neutral position shown. Fluid underpressure will' then bei ven-ted from chamber for stoppingthel powerfpis ton 6 in its neutral position and:` forlthereby stopping the clutchlever in` its "neutralt position.

Fluid under pressure is vented from passage l 35 uponthe initial movement of the pilot piston` I4 out ofits `left hand position as. above described. Piston chamber 6B the` interlock` valve device 53: is. thus opened to .theatmosphere bywaylof passage 35 andas .a resultspring B5..Wi11;seat the supply valve 68;. and open the ValveSBi-toqconnect pipe 52` to `theatmosphere tothereby provideV for operation of thefengineY atidlingrspeed when theclutchis disengaged. l 1

If the-operator now desires to movethe` clutch arm 3` from.` neutral positionto the astern position he moves the lever 9 to. the'left hand end of the portio n|'22:\of` slot I2 l1 and if desired he may then move itinto-itheportion` |24 ofsaid slot. v 'Ihe lever |09v as it is` thusmoved operates :theplunger ||2`to rockthe lever 85u11 a clockwise direction for actuating the selector valve device 11 to supply iiuid under pressure to pipe 25 while allowing the .selector Jvalve device 'I0 to remain in the condition `opening pipe 23 to the atmosphere.

The pressure of fluid thus supplied to,pipe25 flows into chamber 24 and moves the pilot piston I4 in the 'direction of the right hand until ythe stop 3'I on the reach rod 20 engages the jaw 3S. The reach rod 20 as it is thus moved actuates the valve device I3 for supplying fluid under pressure to-chamber YI wherein it acts on the power piston 6 to move same and thereby the clutch arm 3 in the direction from neutralwposition towards the astern position. As the power piston is thus moved it rocks the lever I8 about its connection with the reach rod which permits the pilot piston I4 to move inthe same direction,

and this movement continues until the pilot piston attains its right hand or reverse position in which passage v35 is opened to the pilot piston chamber 24 and at which time lthe power piston B will have moved the clutch arm 3 substantially into its astern position. When this condition is obtained, fluid pressure will flow from chamber.

24 to passage 35 for actuating the Yunloading valve device |24a to open chamber I0 to the atmosphere for thereby relieving the piston 6 andk thereby the clutch operating arm 3 of actuating force. Fluid under pressure supplied to passage 35 also ows to the interlock valve device 53 and actuates same to connect pipe 52 to pipev 62 so that the power motor 43vmay operate to accelerate the engine to a speed determined by the position of the lever |09 in the portion |24 of slot If'l the operator now desires to return the clutch arm 3 from the ."astern position to the neutral position he returns the lever |00 to its neutral position shown in Fig. 2 for thereby eiectingr* operation of the self-lapping valve device 'I8 to openpipe 02 to the atmosphere followed by operation of the selective valve device 'II'to open pipe to the atmosphere. The power motor'43 will thus be operated to provide for reducing the speed of the engine to idling; the clutch control motor will operate Ito move the clutch arm' 3 back to its neutral position, and the interlock valve device -53 will also operate to open the speed control pipe 52 to the atmosphere, in a manner Which will be apparent from the above description.

Let it be assumed thatthe operators lever |09 is positioned in the portion |23 of slot I2| providing for the clutch arm 3 being in forward position and the engine operating at a speed above idling, and that it is desired to reverse the direction of movement ofthe craft. To accomplish this,V the operator may move the lever I3 out of the portion |23 of slot |2I into theportion |22 and th'ento the left hand end thereof as viewed in Fig. 2 and into the portion |24. The lever |00 as it is thus moved will actuate the plunger |I2 and thereby lever 95 to eiect operationof the selector valve device 'I6 to open pipe 23 Vand thereby the pilot piston chamber 22 to the' atmosphere, and'at the same time will operate the selective'valve device 'I'I to supply fluid under pressure to pipe 25, and from'thence, to pilot piston chamber 24. lWith the pilot piston charnber-22 Vthus opened to the atmosphere and fluid under pressure supplied to chamber 24, the pilot piston I4 will be'movedvfrom its extreme left hand or forward position in the direction of the right hand until the stopl 3l on the reach rod 20 engages the jaw 36.- In this position. Qf the,

'pipe |25 and the valve devices I2 and I3.

so that the unloading valve device |2411 will open communication between the fluid pressure supply The reach rod 20 as it is thus operated actuates the valve device I2 to open the power piston chamber 9 to the atmosphere and at the same time actuates the valve device I3 to supply fluid under pressure, supplied through the unloading valve device |24a, to ,chamber I to move the power piston 5 and thereby the clutch arm 3 from the forward position toward their. astern position. The pilot piston I4 will move with the power piston 6 as previously described while the reach rod remains stationary, until the pilot piston attains substantially its extreme right-hand or reverse position and opens passage 35 to chamber 24, at which time', the power piston 5 will also be substantially in its right hand position and with the clutch arm 3 in its astern position. When this conditionis obtained fluid pressure will then be supplied through passage 3'5 to the unloading valve device |24a for operating same to open chamber I0 to the atmosphere for thereby relieving the power piston 6 and clutch arm 3 of actuating force.

When the lever |00 is moved from 'the portion |23 of slot |2| Ythrough the portion |22 into the portion |24, it will be noted that the self-lapping valve device Y'I8 will be operated to first vent fluid under pressure from pipe 52 and then to immediately resupply fluid under pressure to said pipe. This however, is immaterial since initial movement of the pilot piston I4 out of its extreme lei't hand position causes operation of the interlock valve device 53 to break the connection between pipes 62 and 52 and open the latter to atmosphere and this connection is maintained until the pilot piston I4 and thereby the power piston obtain substantially the extreme right hand positions. Thus upon this operation of the operators lever` |09 the fuel control motor 43 will operate to provide'for operation of the engine at idling speed and retain this condition until the clutch arm 3 has attained its astern position.

In case the craft is moving in an astern direction and the operator desires that the craft move forwardly he will move the lever |09 to the right hand end of the portion |22 of slot |2| and then into the portion |23 of said slot, and the apparatus will function in a manner which will be apparent from the above description to first provide Afor reducing the engine speed at idling and for Vthen shifting the clutch arm 3 from the astern to its forward position while retaining this reduced speed condition of the engine. Then after the forward position of the clutch arm 3 `with the kexception of the manually operative control device 15, and the operation. of said parts including said device, as so far described, is substantially the same as of the apparatus disclosed in the aforementioned pending application.

From the above description it will be noted that through the medium of the interlock valve device 53 as controlled by the pilot piston I4 through passage 35, the engine cannot be accelerated above idling speed with the clutch disengaged. The interlock valve device also provides for the speed of the'engine being reduced to idling upon move` the lever |09"` out of: the portion.l

asoman? Vdisengagement of the clutch, but. lit does vnlzxteinf-i lsure `this beingobtained under all conditions. of

|3-.A It isthus possible for the operatortd move the lever |Y B19. from the fullspeed forward position tothe ffullspeed asternzposition.withsuch rapidity aslto cause the clutch. .arm 3 toA move from itsfforward. position toits astern position for disengaging and-then. reengaging the .clutch before the engine. speed can` be.- reducedfto :idling or some other relatively low degree, andLthi-s. of coursernight resultin damageixto the clutch, ena. gine or other parts of.. thesystem.z

The invention, which," will now" be: described, consists of interlock means for'insuring; that the speed' of the engine :will be. reducedto a chosen low degree beforef. the clutch can: be` engaged un.- cler conditions such asjust set forth; This `interlock means is preferably in the form of at finger or member |39. arranged to move.- into the-path of movement of lever |09 through theportion-.HZ of slot HH forv preventingjsaid :leverbeing` moved fromr one end of said. portion ofxsaidrslot tor-the opposite: end.. for 1 effecting disengagement lof: the clutch in. either. forwardif or astem positonof arm-3 and their reengagement in theiotherposiftion, until-iafter wperiodoftimeehas expiredwhich is adequate to: insure. that the speedzof the-engine willbe reducedfta a chosen low fdegree'.;`

' l'I'he member |30isrockable abontzra pin. |r3i| secured in the coverzlz andris providedxwitna slot |532f toy allow a certain movement-tly ci lsaidfm'ember relative to.. said: pirr in". order .tof` permittmove. ment of theoperators lever."liuaisubstantiallygto its neutraliV position. upon; engagement '-withieither side of said member., Aspring |f33 havingioneend anchored tothe cover; |.2ltfis .connected underztenis sion tothe memberl tmfor pullingrsazidrmember out of the path of movementzofizthe `operating lever lll-91. .For moving saidtmembeiintothezpath of movement; oflever lllgraaamovable abutment preferably in the forma of aeexiblc diaphragm |34-is provided. This diaphragmtvhas-one -side connected with` thewmember. L30: through;tlricimfe` l dium of` a rod |315'and'at. itsopposite side there is provided a.. chamber |36- which.. is.r connected through'apipefl |3i1 toathel speed control pipea-SZ leading to the self-lapping valve device- With this arrarigerrient,4 whenftheoperators lever |09 is in eitherportionA |24: orportion; L23

of slot` .|.2| provdingior operationmf. the. engine at aspeedabove idling, the pressurefzotuid; suppliedto pipe @Zier controlling"the-enginerspeed also equalizes through pipeA |31into'chamber436, wherein it actsz.onrdiaphragrm.|3'4 fori'dei'ecting same tol move: the-member: 30 .i'ntothe `path` of movement of leverl |119 throughgthe porti0m|fZ2 .;of

Now if the operator desiresl tolsudderrlyreverse the direction of movement of therfcrafthe will l-23forportion |24 of slot |2t into the portionlZZ and against the member. |30 which. willthen :prevent movement of said. lever to` themippcsiteA endtof portion |22 of the slot. The slfottlliz in member |30 however provides for-4 l'everlllB-Ibeing moved to substantiallyy its neutrali. posi-tior-Il in; which; the

that I` have-provided an improved systemfonconreduced to. the clutchL cannot be engaged: in;-r eithernitslfonwardl `means for preventing reversal connectionwiththe prime. mover'operating above -periodi proportional to acceleration of the is; substantially Ireengagedz "Having now' described my invention,` what'lI eration, a: member arrangedto fclutohnontrol motor 5; may operate to. returnfthe .clutclnarrm 3.: from` either its` forward positionfor .its..astern? position tosits neutralwposition for disengagingztheclutchy and also i'n Which'theselflappingrvalve device 78.opens.. the speed: control pipe 162i to atmosphere. Thepressure of iluidlin chamber |1315 willtV then reduce by-way of a choke K lever `to the desiredrend. of` the:- portionf |12 Z of slot |121 lfor thereby causing operation' of said 'control memberr: to. move the. clutch. arm 3.to1its ciano. site clutch` engagingup'osition. The choke |3& .is oflsuchrsize with respect` toc-the volume of chamber |36'.l as to'l insure the member |30. holdingftle operators lever ingf the clutch` untill thespeed. ofi the1engin'e..is desired low degree, so thatizthe on astem l position with theengine operating above sucnlchosenspeed.

Summary s v From". the above .description it `willnow` bei` seen trou-ing the speed..-}or powerv output of` avprime moveig; such asarr internal combustiomengine, and theV operation of` a; three position:` reversing clutch for connecting and disconnecting said prime mover torandzfrom adevice to-.be'dri-ven which prevents reversing of the clutchf and therebythe connection `between the primemover and 4devicewith. the prime mover operating above'a chosenrspeed and which then preventsaccelera, tion; of the prime mover until` after the clutch-,z is operated` to. substantially: establish. the `drive connection betweentthe prime. mover and device; The of the clutch drive chosen speedlris conditioned from the speed.- control pipe while lthe prime mover is operatingfin excess. offthe chosen speed, ,to provide a :delay the degree of such: excess in order'to4 insure: the required decelerationofnthe prime 'mover from any ofthelprime mover vat` which.` reversal of the drive connection maybe eiected `mayy be idling Aspeed or` a speed greater than." idling, if desired. After the speed of the prime mover has been thus reducedto allow reversal of the clutch; means controlled .by the clutchsoperating means prevents primetmover until.` the clutch as newand desiretosecure by Letters Paten is:v

. 1.: In combination; a control lever havingY a first position for effecting. a `desired operation;` a second: position-for eiectingl a. different' desired operation and being movable beyond saidrsecond position for eiecting a still different desired opprevent movement of said lever from saidsecond position` to said irst. position, actuating means f conditioned upon said' movement lot." said `lever beyondsaid secorldaposition4 to render said' member effective,

and timing means cooperative with said actuatingmeans upon-return ofi` said-lever from beyond said?v `second position` to said secondsposition` to maintain: said membereffectivefforl a certain; in.- terval of time` after` said return ofy saiduleverrto Vsaid secondiposition.. Y. w r

I 09 against; movementfor .reversprevious speedto allowfrer-` versaI the drive connection.: The chosen Speed 'V2.,In combination. a control `lever havinga xlirstpositin for eiecting adesiredoperationa 'scondiposition foreiecting a different-desired operation and being `movable beyond 'said second position for supplying fluid to a pipe to effect a still different operation, and being movable back to said second position to release duid under :pressure fromvsaid pipe, a member operable to prevent movement of said lever fromsaid second position to said rst position, means operable. upon an increase in pressure inisaid pipe to acertain degree to render said member effective, and means operable upon a reduction in .pres- -surey of'fluid in said pipe to belowsaid certain `degree to Vrender said member ineffective. I

'3.'1ln combination, a control lever having a -nrst position for effecting a desired operation, a second positionfor effecting a different desired operation and being movable beyond said second position for supplying fluid-to Va timing chamber at a pressure proportional -to the extent of such :movement and being operable upon return to'said second position for releasing-fluid under pressure from said chamber, a member arranged to prevent movement of said lever from said second 'position .to said first position, means controlled bypfessure o'f iluid in said chamber controlling said'member and operable when such pressure exceeds-*a certain degree to render said member effective and vwhen less than said certaindegree to render said member 'ineifective and means for restricting the release of iiuid under pressure from said chamber. 4; In combination, a control level` having a first position forv effecting a desired operation, a secondI position for effectingV a different desired operation and being movable beyond said lsecond position for supplying fluid to a pipe at a pressure proportional to the extent of such movement and being movable back to said second position toY open said pipe to atmosphere, a timing cham- -ber open to said pipe to be charged with fluid at the pressure vsupplied to`said pipe,y a choke for lrestricting the release of uid under pressure from said chamber to ysaid pipe,I a member' arranged to hold said lever against movement from said second 'position to said rst position, and 'means for controlling said member controlled by pressure of 'fluid in said chamber and operable when such pressure exceeds a certain degree to 'render said member'eiective and when less than said certain degree ineiective.

5. In combinatioma control lever having two different positions for effecting different operations, a pipe, valve means operable to supply fluid under pressure to said pipe to effect a third operation, a member arranged to prevent movement of said lever from one of said two positions ,to the other, means for controlling said member operable upon a certain increase in pressure in said pipe to' render said member effective, and means operable when the pressure in said pipe is of a lower degree to render said member ineffective.

v 6. In combination, a control lever having two Vdifferent positions for effecting different operations, a pipe, valve means operableto supply fluid under pressure to said pipe to effect a third operation, a member arranged to prevent movement of said lever from one of said two positions i to the other, meansk forcontrolling said mem- -ber operable upon a certain increase in pressure in said pipe to render said member effective, and Vmeans operable when the pressure. in said pipe is of a lower degree to render said member inei-i lerable by a certain -fe'ctive, said lever having a movement beyond 'one of said two Vof said valve sure to said pipe and being operable upon return positions for effecting operation means to supply fluid under presof said two positions to efiect operarelease fluid under to said one tion of said valve means to pressure from said pipe.

rI. An lapparatus for governing the speed of a prime mover and for controlling the connecting and disconnecting of said prime mover to and from a member to be driven comprising in combination, a pi'pe through which the speed of said prime mover is arranged to be adjusted in accordance with pressure of fluid in said pipe, valve means operable to adjust the pressure of fluid in said pipe, a control lever having one drive position for connecting said prime mover to said device to cause said device to be driven in one direction and a second drive position for connecting said prime mover to said device to cause said device to be driven in the reverse direction, a member arranged to hold said lever against movement from'one of said drive positions to the other, means controlling said member and oppressure of fluid in said pipe to render'said member effective, andmeans operative to render said Amember ineective when the pressure of fluid in said pipe is less than said certain pressure.

8; AnV apparatus for governing the speed of a prime mover and for controlling the connecting and disconnecting of said prime mover to and from a mem-ber to be driven comprising in combination, a pipe through which the speed of said prime mover is arranged to be adjusted in accordance with pressure of fluid in said pipey valve position for connecting saidV prime mover to said deviceV to cause said device to be driven in one direction and a second drive position for connecting said prime mover to said device to cause said device to be driven in the reverse direction, said lever also having a non-driving position between the two drive positions for disconnecting said prime mover from said device, a member arranged to hold said lever against movement from either of said drive positions to the other but at the same time providing for movement of said lever'from either drive position substantially to said non-driving position, and means controlling said member controlled by pressure of fluid from said pipe and operable when such pressure exceeds a chosen degree to render said member effective and when less than said certain degree ineffective.

" 9. An apparatus for governing the speed of an 'internal combustion engine and the operation of Vfromsaid device, said apparatus comprising in combination, a speed control motor adjustable by uid pressure to vary the speed of said engine in proportion to the pressure of such fluid, valve means operable to supply iiuid under pressure to and release uid under pressure from said motor for regulating the speed of said engine, a control lever having a iirst drive position for conditioning said clutch to connect said engine to said device to drive said device in one direction, a second drive position-for conditioning said clutch to connect said engine to said device to drive said device inthe opposite direction and a third position forconditioning saidclutch Vto disconnect vabutment connected to ysaid assess? said device from said engine, a member arranged tocooperate with said lever to secure same against' movement from said rst position to said second position or vice versa but providing for movement from either said rst or second position substantially to said third position, a movable abutment connected to said member and controlled bypressure of .Iiuid supplied to said speed control motor and operable when such pressure exceeds a chosen degree to render said member effective, and means operative to render said member ineffective when the pressure `of fluid acting in said speed control motor isofalower degree.

10. An apparatus for governing the speed of an internal combustion engine and the operation of a clutch to connect said engine to a Vdevice to drive said device in either one direction or the opposite direction or to disconnectsaid engine from said device, said apparatus comprising in combination, a speed control motor adjustable by lluid pressure to vary the speed of said engine in proportion to the pressure of such iluid, valve means operable to supply fluid under pressure to and release uid under for regulating the speed of said engine, a con-l trol lever having a first drive positionfor conditioning said clutch to connect saidv engine to said device to drive said device in 'one direction, -a second drive position for conditioning said clutch to connect said engine to said device to drive said device in the opposite direction and a third position ,for conditioning said clutch to disconnect said device from said engine, a member` arranged to cooperate with said lever to secure same against movement :from said first positionto said second ,L

position or vice versa but providing forwmovement from either said rst or second `position substantially to said third position, a movable member controlled .by pressure of fluid in a chamber and operable when said pressure exceeds a chosen degree torender said member elective, means operable to render said member ineiective upon a reduc-tion in pres-` sure in said chamber toa lower degree, a com munication connecting said chamber and pipe providing for charging of said chamber with kfluid at the pressure supplied to said pipe and providing for release of duid under pressure rronsoid chamber by way of. said pipe, and a choke said communica-tion forvrestricting the release fof fluid 1 disconnecting said .engine from said dev1ce and under pressure from said chamber to said pipe..

1,1. An apparatus for governing the speed of an internal combustion engine and the operation of a clutch to connect said engine to a device to drive said device in either one direction or the opposite direction or to disconnect said engine from said device, said apparatus comprising in combination, a speed `c ntrol motor adjustable by duid pressure to vary the speed of said engine in proportion to the pressure of such duid, valve means operable to supply fluid under pressure to and release iiuid under Vpressure from said motor for regulatingthe speed of said engine,a control lever having a rst drive position for conf ditioning said clutch to connect said engine to said device to drive said device in one direction, a second drive position `for conditioning `Said clutch to connect said engine to said device to e drive said device in the opDOsite direction and a third position for conditioning saidclutch to ldisconnect said device from said engine, a member arranged to cooperate with said lever to secure Same against movementfromsaid rst 4pilosition to said second position or vice -versa but providing for movement from .either said first or second povary the speed of` 4said engine, a lever pressure from said motor sition substantially to said third position, a movable abutment connected to said member and controlled by'pressure of fluid supplied tosaid speed control motor and operable when such pressure exceeds a chosen degree to render said member effective, and means operative to render said member ineffective when the, pressure of fluid acting in said speedcontrol motor is of'a lower degree, the said positions ofrsaid lieverfbeing so arranged as to provide for movement of said lever in the same plane from one to the other, ,Said lever being also movable outof said plane, `and means operable by `said lever` upon movementout of said plane to eiec't Operation of said valve means to supply fluid under pressure to said pipe and upon return to said planev to effect operation Iof'sfaid valve means to open saidpipe to atmosphere.l

l2. A -system for controlling the speed ofA an internal combustion engine and the connecting and disconnecting of said engine to and fromv a device to be driven, said system comprising in combination, power control-means .adjustable to having fone position for disconnecting said enginefrorn said device and another position for connecting said engine tosaid device, and means conditionable in accordance'` with adjustment of said power control means for controlling movement of said lever and operative to'prevent movement of said lever from ,said one Positionto the other position with said power control 'means adjusted to provide operation ,of said engine ata speed exceeding a certain chosenspeed, and to provide for movement of said lever from said one position to said other position with said power control means adjusted to provide for operation of said engine at a speed belowrsaid chosen speed.`

13. A system for controlling the speed of an internal combustion engine and the connecting and'disconnecting of said engine to andY from va device to A be driven, said system comprising in combination, power control .means adjustable by Iiuid under pressure to vary the speed of said engine in accordance with the degree of such pressure, valve `means for varying the pressure of uid on said control means from a chosen low degree providing for operation of said engine .at a chosen reduced speed through a `range to a niger degree to provide for corresponding increase in speed of said engine, a lever having oneposition for another position for connecting said engine to said device, interlock means operable by a chosen pressure of duid supplied by said valve means to prevent movement of said lever from .said one position to the other position, and means operable upon a reduction in pressure of Iud onsad interlock means to below said .chosen pressure to render said interlockmeans neectve.

14. A control devicefor controlling the speed of ,a prime mover `and the positioning ofa clutch control member 4for ,connectingand disconnecting Said prime mover to andfrom .a deviceto be driven, said clutch control member having two driving positions, and anv intermediate non-driving position, said control device comprising in combination a control lever having a rst position for effecting movement o f said clutch control member .to one of said .driving positions, la second position ior eiiecting movement of said clutch control ,member to the-other of said .drive ing positions, and a third position `for effecting movement of said clutch control member .to said non-driving position, `means conditionable by said lever in said iirst, second, and third positionsto 1 0 provide for 'operation of said engine'ata `chosen low or idling speed, said lever'having beyond each of said first and second positiOnS a speed control Zone and being movable into either of said zones toeect operation of saidv means to increase the speed of said engine,delay meansarranged to prevent movement of said lever from either one of said rst or second positions in the direction of the other past said tlfiird'positiomV and means for controlling said delay'means operative to vrender saidA delayY means effective'when said engineV speedfisfabove' a'chosen "degree and ineffective when below saidchOSendegree.

V15. A control device for controlling the sp'eed of a prime mover andthe positioning of a clutch control member for connecting and` disconnecting said prime mover to and from a' device to be driven, said clutch control member having two driving positions, andan intermediate non-driving position, said control device comprising'inr combination a control lever having a first position for effecting movement of said clutch control member to one of said driving positions, a second position for effecting movement of said clutch control member to the other'of said driving positions, and a third position for effecting movement in accordance with the speed of said prime moverVY of said clutch control Vmember to said non-drivingposition, means conditionable by said lever in said first, second and third positions to provide for operation of said engine at a. chosen lowror idling speed, said lever having beyond each of said first. and second positions aspeed control'zone and being movableV into either of said Zones to effect operationof said means to increase the speed of said engine, delaymeans movable upon movement of said lever into either of said zones into the path of movement of said lever between saidrrst and second positions and operable upon returnV of said lever from eitherof said zones to the adjacent one of said first or second positions to provide for movement of .said lever to said third position but to prevent movement of said lever to the other `one of said first or second positions, and means operable a; certain time interval after movement of said lever out of either said zones to the adjacent one of said first or second positions to movesaid delay means out of the path of movement of said lever, p Y g '16.' A control device for controlling the `speed of a prime mover and the positioning of a clutch control member for; connecting and disconnecting said prime mover to and from a devicetoV be driven, said clutch control member having two driving positions, and an intermediate non-driving position, saidfcontrol deviceV comprising in combination a control lever having a rst position for effecting movement of said clntchcon-V trol member to one of said driving. positions, a second position forV effecting movement of` said clutch control member to the other of said driving positions, and a third position foreii'ecting movement of said clutch control member to said non-driving position, means conditionable bysaid lever in ,said first, second and third vpositions to provideforoperation of saidengine ata chosen low or idling speed, said lever having beyond each of said rst and secondpositions a speed control zone and being movable into either .of said zones to-effect operation of said means to increasethe speed of said enginedelayA means operable to prevent movement. of*V said lever to Said second position upon movement into said first position from the adjacent speed Zone .to said'rst position upon movement from the other speed to provide for zone but providing Vfor movement of saidlever substantially into` said third'position, means operable t0 render said delaymeans effective upon movement of saidlever into either of said speed zones,l means voperable Ato render said delay7 means ineffective, and control means providingfor'operation of the last named means a chosen'inter'- val of time after movement ofsaid lever ont of either of saidzones.

17. A control device for controlling the speed of a prime mover and the positioning of aclutch control member for connecting-and disconnecting said primemover to and` from a device to be driven, saidv clutch control member having two` driving positions, and an intermediate -non-driving position, said control device comprising in combination a control lever having a first position for eifecting-movement-of7 said clutch' control member to one ,'of'said driving positions, a second position for efecting'movement of said clutch control member lto the other ofsaid driving positions, 'position for effecting and a third movement of said clutch controlmemberfto said non-driving position, means conditionable by said lever in said first, second and third positionsr to provide for operation of saidengine at a'chosen low or idling speed, said-lever having beyond each of said rst and second positions a speedcontrol Zone and being movable into either of said zones to effect4 operation of said means to` increase the speed ofsaid engine, delay. means conditionable upon movement of said lever into either o f said zones to prevent 'movement-, of said lever to the said first or second position vwhich 'is adjacent the otherof said zones, means operable acertain interval of time after movement ofsaid lever out of either of said zones to the adjacent one of said first or second positions to render said 'delay means ineffective, and means controlling said time interval? 18. A control device for controlling the speed of a prime mover and the positioning o f a clutch contro1 member for connecting and disconnecting said prime mover Vto and from a dev iceto be driven s'aid clutchcontr'ol member having two driving positionV andan intermediate non-driving position,r said controlf device comprising in combination a control leverliaving a iirst position for effecting inovei`ij1ent`of said clutch control member to one of` said driving positions, a second position'for effecting movement Vof said clutch control member to the other of said driving positions, and a third position for effecting movement of said clutch control member to said non-driving position,Y means conditonable -by said lever Yin said rst, second andthird positions operation of said engine ata chosen low or idlingspeed, said lever'ha'ving-beyond each of said first and second positions a speed control zone and being movable into eitherjof-said-zones to effect operation of ls aid means'to Vincrease the speed of said engine, va blocking member movable into andout of the path ofmov'em'ent of said Y lever between the saidA rst andsecord positions Y ment out of such zone to provide for release fluid luider pressure from said chamber, and means arranged to restrict the rate of release of fluid under pressure from said chamber toprovide said chosen degree of Vpressure therein a certain interval of time after movement of said member out of either of said zones. Y

19.V In combination, three fluid control pipes, valve means for controlling the pressure of fluid in two of said pipes, a valve device for controlling the pressure of uid in the third pipe,.a control lever having a neutral position and operative therein to effect operation of said valve means to open the respective pipes to atmosphere and op- `shift-.able when in said path to provide for movement of said lever from said second position to said neutral position butto prevent movement of said lever to said third position and to provide for movement of said lever from said third position to said neutral position but to prevent movement of said lever to said second position, a movable abutment connected to said member'and subject to pressure of fluid in a chamber open `to erative upon movement from said neutralposition inA one direction to a second position toeffect operation of saidV valve'means to supply fluid underpressure'to one of said two pipes' and to open the other of Asaid "two pipes to atmosphere and operative upon movement from neutral position in another direction toa third position to supply `fluid under pressure tofsaid other of said two pipes and open said one of said two pipes `to atmosphere, said lever in said neutral, second andfthird positions providing for operation `of said valve device` to openV said third pipe to at- Inosphere and being operative upon furthermovement in either of said directions beyond said second or third positions to retain the respective one of said two pipes supplied with fluid under pressure and to supply uid'under pressure to said third pipe, a movable abutment subject to pressure of fluid in a chamber open to saidthird pipe, means controlled by said'abutment arranged to prevent movement of said lever fromsaid second position through said neutral position to said third position, anvdnromY said third position `through said neutral pcsitionto said second-position and `rendered#effective by a certain pressure of fluid in said Vchamber -on said abutment and ineffective upon a lowerpressure of fluid in said chamber, vand means arranged vto destrict the release of iiuid under pressure from said chamber in said neutral, second-'and-third positionsofsaidlever. i V f n20. In combination, threeiuid control pipes, y

valve meansfor controlling the pressure of lfluid in two `i'iffsaidpipes,A a valve device i for f controllingv thefp'rssure of fluid in" therthird l piper-ia control ieverhaving aL-neutral' position and-"operative therein to effect operation of said valve `ineansto open the respective pipes to atmosphere and foperative upon movement `from 'said neutral position inonedirection to a second `postionto effect operationof said valve means to supply fluid under pressure to one of saidtwo pipes and to open the other'of said two pipes to atmosphere and operative upon movement-from neutralposition in another `direction to a third position to supply fluid underpressure tosaid other of said twol pipes and open said one:` of said two pipes to atmosphere, said lever in -said neutral, second and third positions providing for operation `of said valve device to open said third pipe `to atmosphere and being Voperative upon further movement in either 'of said-directions ,beyond said second lor third positions to retain the ,re-

-spective one of. said two` pipes supplied with fluid under pressure Yand to supply fluid unclerpressure -to said 'thirdpipe ,amember movable intoand outiofithe path Vofmovement. vof. saidflevercand pressure of fluid supplied to saidchamber into chamber.

said third pipe and operableupon a certain increase in pressure in said 'chamber to move said member into the path of movement of said lever, means operable upon a reduction `iii-,pressure in said chamber by now of uid therefrom to said third pipe to move said member out of the path of movement of said lever, and means arranged to retard the rate `of reduction in pressure in said chamber by now back to said third pipe.

21. A control valve device comprising a control lever having a neutral position and at one side thereof a second position and at the opposite side a third position, all of said positions being arranged in the same plane,- said lever being movable beyond said second position into a certain control zone and beyond said third position into a different controlfzone, avchamber, `valve means operable by said lever upon movement intoreith-er of said control zones to supply fluid under pressure to said chamber, saidleverin all ofsaid positions effecting operation of saidvalve means .to vent fluidunder pressurefrom lsaid chamber, control means movable upon a certain increase in against movement from said second positionvto said third position or from said third position to said second position, release means operable upon a reduction in pressure 'of uid in said chamber to a certain chosen degree to move *said control means out of cooperative relationwith 'said lever to render said lever movable toany of its different positions, and means for restricting the rate of ventingl of uid under pressure from said cooperative relation withsaid lever to hold same 22. A control valve device comprising a control lever having afneutral position Aand at one side thereof a second position and Vat the opposite side a third positionyallof said positions being arranged in the same plane, said lever :being movable beyond said secondposition intoia certain control zone and beyond said third position into a different control zone, a chamber., valve means operable by said lever upon movement into either of said control zones to supply fluid under pressure to said chamber, said lever in all of said positions effecting operation of said valve means to vent fluid under pressure fromlsaid chamber, a member movable into and out of thepath` of movement of said lever between said positions and operable when in said path `to secure4 `said lever against movement from said second position to said thirdposition orfrom ksaid `third, position tosaid second position and shifta-ble by contact with said lever vto render said lever movable from either said second or third positions atithefopposite -sider mover.:l in'y accordance with the-:pressure 'of jfluid l in? said-"pipe, a control .de'viceg .comprising 'a lever havinga neutral positionfor effecting operation of fithe clutch 'control imeansj to; disconnect said prime-mover -froma said fdev-ice, Vand at one side of :saidTr neutral; position al secondl position, for

effecting operation of `said clutchV j'control means to connectv said-prime .mover to-said device, Yand of-rsaid neutral position `a third position.forfalsogefecting operation of said clutch controlfmeans-to connect said primemover to saiddevice; valve rneans controlled by` said lever for 'controlling the pressure vof uid in said pipe and *conditionabl'e--by said lever in saidneutralg'second and thirdg positions-toopen-said pipe intoiatmos'phereisaid leverhavingfone speedcontrol zonerbjeyond said second-positionand another speed control-'zone vbeyondsaid -third position vand being-:operableupon movement intoeither -ofsaid zonesftofeiectzoperation--of--said-valve means to supplyeiiuidgto said pipe-jat a- 1pressure proportionalxto the-'extent of -movement away from. said second or third positions-.a latch associated with said control-device ior. movement into and out ofi-fthepatho-movement--of said lever between said-second and third lpositions and-.beingwoperable when-insaid patlr` of 'movement to. hold said lever against gmovement; from -said .second .position tosa-id-third position orfrom-third position to fsaidrsecondposition but providing` for movement-osaid leverfrom, either said second or third positionstosaid vneutral position, a movable abutment connected-tovsaid latch land subject to pressure-oi -fluid in-achamber'open to said .pipe and operable upony a certain increase in pressure offluid'y iii-,said ichamber to. move 4said latch, into the path foi-movementot said-lever, means connected to said latch operative'to move same out of the path ofsaid -lever upon a reduction in pressure of fluid in said-chamber to-a certain low degree kby flow therefrom nect said prime mover to and from-a member to be driven, said cl-utch controlmember having .-a'

neutral position` for disconnecting said prime .mover and member and `at either-side of said driving position for connecting said-prime mover to said member,- saidsystem comprising in combination, a. power motor' adjustable by fluid pressure to vary the speed of said primel mover in proportion to pressure of such fluid, a pipe for supplyinguid under pressure to and releasing viiuid' under pressure from said motor, a control device` 'comprising a lever having a neutral position and at one side thereof a, second position and at the opposite side a third position, means operable upon movement of said lever to said neutral position to effect movement of said clutch control member to its neutral position and upon movement of said lever to said second position to effect movement of saidclutch control member to one of its driving positions, and upon movement of said lever to said third position to eiect movement of said clutch control member to its otherdriving positions, saidlever neutral position a through said pipe, and means for restricting v.the release of fluid having'beyond-said second position a speed control zoneand beyond said third position another speed'control Zone, valvegmeansfor controlling the pressure of uid in said pipe and controlled by said lever,- said. leverl being operative upon movement into either of said zones to` eiect operation of saidvalve means `to supply fluid to said pipe at av pressurepro-portional tothe extent of movementy away from said second or third positions and being operative in said'neutral, second and third positions thereof to effect operation of said valve means to opensaidpipeito.atmosphere, awstop `member invsaid control device arranged to. be-*moved* into and-out. of the path ofmovement/of Vsaidlever between saidsecond and third positions and-:being'operativewhen in said path of movementtoiblock said-lever against movement lfrom saidseoQnd-.position to said third position orgfrorn said third position to said second position Vwhile providing for-Y movement of said lever from-eithersaid second or third positions to s aidnentral,position-a movableabutment conr-iected-toy said stop-nie` ber and-operable upon an-increase-in-pressure inY aV chamber vabove a certain-degree to.- move /saidstop member into the path-eof-:movement osaid lever,v release means operable-upon@ reduction inpr'essure 'of fluid said chamber vtoa lower deg-ree, to4 move said stop-member Voutizgthe path oi movement of said-lever, said lever Vbeing operable upon, movement;i1 1to--either-o saidzonesto Veffect a supply of fluid under pressure to sad'chamber and upon movement out/of either of said V-Zones to provide for release Aof-ffluid under fpressurefrom? said chamber,- land-means for-.restricting the release of -fluid underl pressure from said chamber for thereby holdingsaidstopv member in the path of movementofsaid lever fora period of timeto provide for-v reduction inlspeed'of said'prime mover to-a ch'osenlow'deg-ree'.VY .A

M25.- An apparatus for controlling the .speed of aA prime moverV and ,the operationef a, reversing clutchto either connect or disconnect said prime mover to or froma member to be driven, said clutch having a yfor-ward,drive condition for causing movement of ,said member in. one Y direction and a reversev drive condition'forcausingmovement jof said member` intheopposite direction, said apparatus comprisingclutch control means operabletopondition said clutch, power control meansv operable-to adjust the speed of said prime mover-, meansrconditionable in accordance with operation-.of said power control means to prevent reversal of said -clutchdrive condition with said prime-mover operating -at a speed`-exceeding a chosen degree,and means controlled byv said clutch. control meansV operable-to prevent operationof said-'power control means to-accelerate said prime -moverwith said clutch out of either 'ofY said drive conditions. :26;'^An apparatus for controlling the speed of a priinelmover and rthe; operation of a reversingV clutch to eitherconnect ;ordisconnect said .primemover tof or from ya member to -be driven, said Vclutch'having a Aforward drive condition for causing `movement ofsaid memberin one direction and a reverse. drivecondition for causing movement of vsaidmember in the opposite direction; said apparatus comprising power control meansua'diustable'to vary'the speed Aof'said prime mover; a. lever' for .controlling said clutch and having aforward'driveposition and a reverse drive position for. correspondinglyV conditioning said clutch and 'also having a neutral position-between said forwardfand reverse'positions for conditioning said clutch to disconnect said engine from said device, blocking means arranged to prevent movement of said lever from said forward position to said reverse position or vice versa, means `operative to render said blocking means ineffective, means conditionable by said power control means to render said blocking means effective with said power control means adjusted to cause operation of said prime mover at a speed above a chosen degree, and means operable in f accordance with the condition of said clutch to prevent operation of said power controlmeans to accelerate said prime mover with said clutch out of either of its driving conditions.

217. An apparatus for controlling the speed of a prime mover andv the operation of afreversing clutch to either connector disconnect said prime mover to or from a member to befdriven, said clutch having a forward drive condition for causing movement of said member in one direction 20 and a reverse drive condition for causing movement of said member in the opposite direction, said apparatus comprising a motor` adjustable by fluid under pressure to vary the speed of said prime mover in proportion to the pressure of such fluid, valve means operable to supply fluid under pressure to and to release uid under pressure from said motor, a lever for controlling said clutch and having a forward position and a reverse position for correspondingly conditioning said clutch, locking means operable to block movement of said lever from said forward position to said reverse position and vice versa, means subject to pressure of fluid in said motor controlling said locking means and operable when such pressure exceeds a chosen degree to render said locking means effective and when less than said chosen degree ineiective, a Valve device forcentrolling communication through which fluid under pressure is supplied to and released from said t motor by said valve means and operable to close said communication and open said motor to atmosphere to provide for operation of said prime mover at a chosen low speed, and means Conditionable in accordance with the conditioning of said clutch for controlling said valve device and operable to effect operation of said valve device to close said communication with said clutch out of said driving conditions and to open said communication with said clutch in said driving conf ditions.

28. An apparatus for controlling the speed of a prime mover and the operation of a reversing clutch to either connect or disconnect said prime mover to or from a memberl to be driven, said clutch having a forward drive condition for causing movement of said member in one direction and a reverse drive condition for causing movement of said member in theopposite direction,

said apparatus 4comprising a motor adjustable by C iiuid pressure to vary the speed of said prime mover in proportion to the pressure of such fluid,

valve means operable to supply fluid under presd sure to and release fluid under pressure from said motor through a speed control pipe for adjusting said motor, an interlock valve device controlling communication through said pipe and operable by iiuid under pressure to open said communication and operable upon release of iiuid under pressure to close said communication and to open said motor to atmosphere to provide for operation of said prime mover at a chosen reduced speed, clutch control means for controlling the conditioning of said clutch and the operation of said interlock valve device and operable with saidclutch in either of its driving conditions to effect operation of said interlock valve device to open communication through said pipe and when outof said driving condition to eifect operation of said interlock valve device to close said communication and open said motor toa-tmosphere, means including a lever for controlling said clutch control means and having a forward position and a reverse positionfor effectingoperation of said clutch controlmeans to correspondingly condition said clutch, interlock means arranged to prevent movement of said lever from said forward position to said reverse position, and means for controlling said interlock means controlled by pressure of-iuid in said speed control pipe and operative when such pressure exceeds a chosen degree to render said member eiective and when less than said chosen degree ineffective.

29. An apparatus for controlling the speed of a prime mover and the operation of a reversing clutch-to either connect or disconnect said prime mover to or from anmremberto be driven, said clutch having a forward drive condition for causing movement ofsaid member in one direction and a reverse drive condition for causing movement of said member in the opposite direction, said apparatusicomprising a motor adjustable by uid pressureto vary the. speed of said prime mover in proportion to the pressure of such iluid, valve means operable to supply uid under pressure to and release uid under pressure from said Amotor through al speed control pipe `foradjusting said motor, an interlock valve device controllingcommunication through said pipe and operable `by fluid under pressure to open said communication and operable upon release of fluid under pressure to close saidcommunication and to open said motor to atmosphere to provide for operation of said prime mover at av chosen reduced speed, clutch control means for controlling the conditioning of said clutch and the operation of said interlock valve device and operable with said clutch in either of its driving conditions to effect operation of said interlock valve device to open communication through said pipe and Vwhen out of said driving conditions to effect operation of said interlock valve device to close said communication and open said motor to atmosphere,

means including a lever for controlling said clutch control means and having a forward position and a reverse position for eifecting operation of said clutch control means to correspondingly condition said clutch, interlock means arranged to prevent movement of said lever from said forward position to said reverse position, and means for controlling said interlock means controlled by pressure of fluid in said speed control pipe and operative when such pressure exceeds a chosen degree to render said member eifective and when less than said chosen degree ineffective, said lever being movable past said forward-and reverse positions into speed control zones, and means connecting saidrvalve means withsaid lever providing for operation of said valve means by said lever to vary the pressure of fluid in said speed control pipe in proportion tothe extent of movement of said lever into said zones away from the adjacent forward or reverse positions, said lever upon movement out of either of said zones being operable tc effect operation of said valve means to open saidspeed control pipe to atmosphere. 30. An apparatus for controlling the speed of a prime mover and the operation of a reversing clutch to either connect or disconnect said prime mover to or from a member to be driven, said Aclitrhhaving. a frvardkiivefcpnditonfras: ,ing movement of saidmemberiin one direction and areverser drive condition for causingmovement of saidv memberpin the. opposite direction,

said apparatus. comprisingamotor;adjustable by fluid pressure to vary (theispeedj of said prime mover in proportion tothe pressure of such huid, valvemeans operable, to ,supply fluid under pres*- sure -to and release fluidiun'der pressure from saidmQtOr through a speed Vcontrol pipe for adjustingvsaid motor, an'interlockvvalve device controlling communication through I said pipe and operable byiiuid ,underpressure to opensaid .communication and operable upon release of fluid under pressure to Aclose said communication and to, open said motor to atmosphere to provide for operationof said prime mover at, a chosen reduced speed, Vclutch control means for controlling the conditioning of said clutch and the operation of said interlock valve device and operable with said clutch in Yeither of its driving conditions to effect operation of said interlock valve device to open communication throughsaid pipe yand when out of said driving conditions to effect operation of said interlock valve device to close said .communication and open said motorto atmosphere, means including a lever for controlling said clutch control means and having a forward position and a reverse position for effecting operation of said clutch control means to correspondinglyvcondition said clutch, interlock means arranged Vto prevent movement of said levervfrom said forward position to said reverse positiomand means for controlling said interlock vmeans ,controlled by pressure ,of fluidin atchamber in constant communication .with said speedcontrol pipeY and therefore arranged to be charged with iiuidunder pressure from said pipe upon supply of uid under pressure to` said pipe and from which fluid under pressure is adapted to `,be released byway of saidpipe upon release offiuid under pressure from said pipe, a choke in said communication arranged to restrict therelease of fiuid. under pressure from saidchamber to said pipe, said means being operativeby a certain chosen degree of fluid pressure in said chamber to render said interlock means effectiveand means operative to render s aid interlock means ineffective when the pressureof fluid in said chamber is less than said chosen degree.

31, A system for controlling thel speed or power output of ar prime mover and theoperation of a clutchto connect and disconnect said prime mover to and from al member to be driven, comprising in combination, a power motor adjustable by fluid pressure to vary the speed of said prime mover in proportion tothe pressure of such fluid, a pipe for supplying fluid under pressure to and releasing uid under pressure from said motor, a clutch control motor comprising movable abutment means for controllingsaid clutch and having a neutral position`,foreffecting disengagement of said Yclutch and being movable in one direction from neutral positionto arsecond position to eiect engagement of saidl clutch andin the opposite direction fromneutral position. to a third position to also effect engagement of said clutch, a control device comprising a lever having a neutral position and at one side thereof a second position and at the opposite side a third position corresponding to thepositions of said movable abutment, @means Operable upon movement of said 'leverA to any one of its positions forefectingmovement of said movable abutment to the corresponding position, said lever having beyond Ysaid second positionfaspeed control zone and beyond said third position another speed control zone, valve means for controlling the pressure of fluid in said pipe,` said lever being operative upon movement into either of said zones to effect operation of said valve means to supply fluid to said pipe at a pressure proportional to. the extent of movement away from the adjacent oneof said second or third positions and ,being operative .in said vneutral position and in saidsecondandthird positions to elect operation of saidl valve means to open said pipe to atmosphere, a stop member in said control device arranged to be moved into and out of the pathof movement of said lever between said second and third positions and being operable when in, said vpath of movement to prevent movement of said lever from .said second position to said third position or from said third position to said second position -but providing .for movement from either said second or, third position tosaid neutral position, a movable abutment connected tofsaidstop member and operable upon a certain increase in'pressure lin a chamber to move saidstoprmember into the Ypath of move- Vment of said lever, a spring connected to said stop member.. and operative uponareduction-in pressure in said chamber toa certain low degree to m'ove said stop member outof the path of Amovemen-t of said lever, said chamber being open to said pipe providing lfor charging thereof with said lever in eitherof itsspeed control zones andthe venting of Wfluid therefrom by way of said pipe upon movement ofsaid leverl out of said zones, means forrestrictingthe flow of. fluid under pressure from. said 1chamber to -saidpipe tothereby maintain said stop member 7in the path vof movement of said lever for a time interval after movement of said lever fromeither of said zonesto the adjacent one` of said second or third positions,y and a valve device controlling communication through said pipev between said control-device and fluid motor and controlled by said movable abutment means and operable to open such communication'with said `abutment means in either its second or third position and-to close such communication and open said fluid motor to the atmosphere with said abutment means out ofsaid second or third position. Y

32. In combination, anoperators control lever having a neutral position and a control position at each ofthe opposite sides of -neutral position, ainember effective to prevent movement of said lever from onecontrolposition to the other but to Apermit movement from either control position to said neutral position, a movable abutment movable4 to one position -by fluid under pressure, means operable to move said abutment to another position. u pon release of such uid under presl sure, means operable `to provide uid under pressure. on said abutment and to release fluid under pressure yfromlsaid abutment, and means operable upon movement of said abutmentto one of its positions to renderV said member effectiveV and upon movement of said abutment .to its other position toA render said member ineffective.

ELLIS is. Haw-ITT 

